Toyo Laser 73 oil heater

[DarkKnight]

How common are flame sensor failures in the Toyo Laser 73 oil heater? Any advice on troubleshooting or fixing this beyond replacing the sensor?

[machinist]

Hello!

Flame sensor failures in the Toyo Laser 73 oil heater aren’t extremely common, but they can happen, especially in older units or those that haven't been maintained well. Before jumping to replace the sensor, it’s worth trying a few troubleshooting steps. First, the most straightforward fix is to clean the sensor, as soot and dust buildup are often the culprits behind a malfunction. Gently clean it using a soft cloth or fine steel wool. You’ll also want to check that the burner and fuel system are clean and functioning correctly, as poor combustion can prevent the flame from being detected. Also, make sure that the wiring and connections to the sensor are intact and not corroded or frayed, as this could cause an intermittent failure. If everything seems fine with the sensor and connections, take a look at the control board, ensuring it’s sending the correct signals to the sensor. Lastly, don’t forget to inspect the exhaust and venting system for blockages that could affect combustion. If none of these steps solve the problem, then replacing the flame sensor might be the next best option.

Hope this helps!